Citation(s) from the GunPolicy.org literature library
Karp, Aaron. 2012 ‘Country Analyses: Puerto Rico.’ Measurement and Use of Statistical Data to Analyze Small Arms in the Caribbean and Latin America; Section IV, p. 27. Mexico City: United Nations Office on Drugs and Crime (UNODC) and the Center of Excellence, National Institute of Statistics and Geography (INEGI). 28 April
If Puerto Ricans owned as many guns as other citizens of the United States, there would be roughly 4 million civilian firearms on the island today. But ownership is much more regulated in Puerto Rico than most of the country, with licensing and registration requirements.
A 2001 survey showed just 6.7 percent of households in Puerto Rico acknowledged gun ownership compared to a national average of 41 percent, suggesting total firearms ownership there is approximately one-fifth the American average.(88)
Assuming the number of guns per owning household is continuous, that equals total ownership of approximately 600,000 guns. Handguns are licensed. To allow for increased rates of ownership since 2001, this is inflated here to 800,000 guns.
88) "Gun Ownership by State", Washington Post, n.d.